
class Box:
    def __init__(self):
        self.l=0
        self.w=0
        self.h=0
    def volume(self):
        return self.l*self.w*self.h

    def bianchang(self):
        return (self.l + self.w + self.h) * 4
    def s(self):
         return (self.l * self.w + self.w * self.h + self.h * self.l) * 2


if __name__=="__main__":
    #volume()
    a=Box()
    a.h=100
    a.w=13
    a.l=14
    print("体积是",a.volume())
    print("表面积是",a.s())
    print(a)